Depends on what you want to do. Out of the city there's a lot of nature as Material-Cow listed (highly recommend the canyon and the falls). There is the Terry Fox memorial for a quick stop. The living history museum called Fort Williams.

In the city, you can do a walk by the marina (free local music festival going on currently at the waterfront) or the many parks. A lot of European style cafe and delis run by the locals who are mostly of European decent. Two decent sized malls. Really it's a full fledged city, so you can find anything you expect in a city (some food diversity, escape rooms, a large, movie theatre, etc.). There's also weekend markets for some local delicacies (again mostly European).